<div class="example h-100">
This is main panel
<div class="aside" style="visibility: visible;">
<div class="aside-header">
<p>.aside-header</p>
</div>
<div class="aside-body">
<p>.aside-body</p>
</div>
<div class="aside-footer">
<p>.aside-footer</p>
</div>
</div>
</div>